Fabrication of N-Doped Carbon Quantum Dots/BiOI Nanocomposite and Its Efficient Photocatalytic Activity Under Visible-Light Irradiation

Pub Date : 2021-07-27 DOI:10.1142/s1793984421500033

Yichang Yu, Ziyuyang Zheng, Wei Liao, Y. Yao, F. Peng, Tingting Chen, J. Wu, Li Feng

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引用次数: 1

Abstract

A novel spherical N-CQDs/BiOI photocatalyst was successfully synthesized through a facile solvothermal method. The optimization experiments of hydrothermal time and temperature were carried out. The effect of ammonium citrate addition was investigated. The as-synthesized photocatalysts were characterized via X-ray diffraction, scanning and transmission electron microscopy, Fourier transform infrared spectrum and elemental analysis. The adsorption and photocatalytic performance of as-synthesized photocatalysts were studied, 0.2N-CQDs/BiOI showed the best performance. For the removal of anionic dye RhB, adsorption occupied a major position. The maximum adsorption capacity was 97.09[Formula: see text]mg/g for RhB. For the removal of cationic dyes X3B, photocatalysis occupied a major position. The photocatalytic activity of 0.2N-CQDs/BiOI was superior to that of nano-TiO2 under the simulate sunlight irradiation. Different scavengers were used to analyze the effect of active species and photocatalytic degradation mechanism of X3B. The outstanding stability and performance make 0.2N-CQDs/BiOI has highly potential applications in wastewater treatment.

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n掺杂碳量子点/BiOI纳米复合材料的制备及其可见光下的高效光催化活性

采用简单的溶剂热法成功合成了一种新型球形N-CQDs/BiOI光催化剂。进行了水热时间和温度的优化实验。考察了柠檬酸铵的加入对合成效果的影响。通过x射线衍射、扫描电镜和透射电镜、傅里叶变换红外光谱和元素分析对合成的光催化剂进行了表征。研究了所合成光催化剂的吸附和光催化性能，以0.2N-CQDs/BiOI为最佳。对于阴离子染料RhB的去除，吸附法占有主要地位。RhB的最大吸附量为97.09 mg/g[公式:见文]。对于阳离子染料X3B的去除，光催化占据了主要地位。在模拟日光照射下，0.2N-CQDs/BiOI的光催化活性优于纳米tio2。采用不同的清除剂对X3B的光催化降解机理进行了分析。优异的稳定性和性能使0.2N-CQDs/BiOI在废水处理中具有很大的应用潜力。

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